The A's to XYZ's of Bending Pipe and Tube
A End: End of bent tube that represents the first tangent.
B End: End of bent tube that represents the last tangent.
CLR: Center line radius (most common call out for bend radii’s of round tube).
CNC V.S. NC: CNC, Computer Numeric Control of the tube in all axis of movement. (X, Y, Z,). NC, Numeric control of only the degree of bend.
"D" of Bend: CLR / OD = "D" of bend
DBB: Distance Between Bends is the straight section of the tube from tangent to tangent.
DOB: Degree of Bend is the measurement of the bend angle.
E-B Factor: (OD /Wall) / (CLR/OD) = E-B Factor
(Empty Bend Factor for evaluating bending without a mandrel)
E-Plane: Bending direction of a cross section done the Easy way.
Ferrous: Mild Steel, Alloy Steel, Stainless Steel.
Gauge: Tube / Pipe wall thickness by established gauge size.
Grip Finish: The typically rough finish applied to tube grooves that grip a tube.
H-Plane: Bending direction of a cross section done the Hard way.
ISR: Inside radius. (most common call out for bend radii’s of square and rectangular tube).
LRA Bend Data: Lengths, Rotations, and Angles, to define a tubular shape.
Multi-Radius: Type of tube groove in the bend die or pressure die that prohibits use of a mandrel.
Multi-Stack: Refers to a machines ability to have more than one bend die stacked on it.
Non-Ferrous: Aluminum, Brass, Copper, Titanium, Inconel.
OD: Outside diameter of work piece.
OSR: Outside radius.
Pipe Size V.S. Tube Size: Two different methods for defining the OD of a tube:
Example for 1.0" Pipe = 1.315 OD
Example for 1.0" Tube = 1.000 OD
Rotation: Swing arm direction of tube bender viewed from above. (CW or CCW)
Tangent: The beginning and ending of an arc or bend.
True Oval V.S. Flat Oval: True Oval, does not have a flat surface, and are also elliptical in shape. Flat Oval, has two parallel flat surfaces connected by an arc.
Wall Factor: OD / Wall = Wall Factor
Wall: Tube / Pipe wall thickness.
XYZ Bend Data: Three dimensional intersecting point coordinates, to determine a tubular shape.